One vertex per element, one color per generator, with an edge from x to x·s.
(18,22)(19,25)(20,29)(24,31)(27,28)(30,32) involution — undirected(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,18,20,22,21,24,29,31)(19,26,28,32,27,23,25,30)(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19,21,27)(18,23,24,26)(20,28,29,25)(22,30,31,32)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(18,24)(19,27)(22,31)(25,28)(2,8)(6,9)(7,16)(14,15)(18,24)(22,31)(23,26)(30,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.